37.56% is the change from 639 to 879
Calculation steps:
[( 879 - 639 ) ÷ 639] x 100 = 37.56%
Formula
Percentage change = [(879 - 639) / 639] x 100
Subtract the new number by the original number
879 - 639 = 240
240 ÷ 639 = 0.3755868544600939
0.3755868544600939 x 100 = 37.56%